Rendering text to a canvas in a frame-less document.

third_party/WebKit/Source/core/css/resolver/StyleResolverState.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 27 matching lines @@
     , m_applyPropertyToRegularStyle(true)
     , m_applyPropertyToVisitedLinkStyle(false)
     , m_hasDirAutoAttribute(false)
     , m_fontBuilder(document)
     , m_elementStyleResources(document, document.devicePixelRatio())
 {
     if (!m_parentStyle) {
         // TODO(jchaffraix): We should make m_parentStyle const (https://crbug.com/468152)
         m_parentStyle = const_cast<ComputedStyle*>(m_elementContext.parentStyle());
     }
-
-    ASSERT(document.isActive());
 }
 
 StyleResolverState::StyleResolverState(Document& document, Element* element, const ComputedStyle* parentStyle)
     : StyleResolverState(document, element ? ElementResolveContext(*element) : ElementResolveContext(document), parentStyle)
 {
 }
 
 StyleResolverState::~StyleResolverState()
 {
     // For performance reasons, explicitly clear HeapVectors and
@@ skipping 30 matching lines @@
 {
     HeapHashMap<CSSPropertyID, Member<const CSSValue>>* map = m_parsedPropertiesForPendingSubstitution.get(&value);
     if (!map) {
         map = new HeapHashMap<CSSPropertyID, Member<const CSSValue>>;
         m_parsedPropertiesForPendingSubstitution.set(&value, map);
     }
     return *map;
 }
 
 } // namespace blink